Search for quadrupole strength in the electroexcitation of the Δ+ (1232)

C. Mertz, C. E. Vellidis, Ricardo Alarcon, D. H. Barkhuff, A. M. Bernstein, W. Bertozzi, V. Burkert, J. Chen, J. R. Comfort, G. Dodson, S. Dolfini, K. Dow, M. Farkhondeh, J. M. Finn, S. Gilad, R. W. Gothe, X. Jiang, K. Joo, N. I. Kaloskamis, A. KarabarbounisJ. J. Kelly, S. Kowalski, C. Kunz, R. W. Lourie, J. I. McIntyre, B. D. Milbrath, R. Miskimen, J. H. Mitchell, C. N. Papanicolas, C. F. Perdrisat, A. J. Sarty, J. Shaw, S. B. Soong, D. Tieger, C. Tschalær, W. Turchinetz, P. E. Ulmer, S. Van Verst, G. A. Warren, L. B. Weinstein, S. Williamson, R. J. Woo, A. Young

Research output: Contribution to journalArticlepeer-review

125 Scopus citations

Abstract

High-precision 1H(e, elp)φ0 measurements at Q2 = 0.126 (GeV/c)2 are presented. It allows the determination of quadrupole amplitudes in the γ*N → △ transition, in which the reliability of electroproduction models was simultaneously tested. The derived quadrupole-to-dipole (I = 3/2) amplitude ratios, RSM = (-6.5 ± 0.2stat+sys ± 2.5mod)% and REM = (-2.1 ± 0.2stat+sys ± 2.0mod)%, are dominated by model error.

Original languageEnglish (US)
Pages (from-to)2963-2966
Number of pages4
JournalPhysical Review Letters
Volume86
Issue number14
DOIs
StatePublished - Apr 2 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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